Im gettin ready to build a "Brain" bucket for my home made ebb n grow bucket system. Easy to build, run pump from nute resevoir to a bucket w/a 1 inch overflow pipe in center of bucket draining back into resevoir. In bottom side of brain bucket have 3/4 vinyl tubing leadin to each bucket. When Brain bucket fills 3/4 in tubing fills all buckets. when timer goes off, nutes drain back to resevoir thru fill pump, overflow pipe in brain bucket prevents flooding. Ill do a video of it during construction and post it when done. only thing with it is nute tank must be below buckets bottom for the nutes to recirculate via gravity. Itll be easy to comprehend when i get the video done.